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1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | // Copyright 2014 Cisco Systems, Inc. All rights reserved. | |
c8806b6c NM |
3 | |
4 | #include <linux/errno.h> | |
5 | #include <linux/types.h> | |
6 | #include <linux/pci.h> | |
7 | ||
8 | #include "wq_enet_desc.h" | |
9 | #include "cq_enet_desc.h" | |
10 | #include "vnic_resource.h" | |
11 | #include "vnic_dev.h" | |
12 | #include "vnic_wq.h" | |
13 | #include "vnic_cq.h" | |
14 | #include "vnic_intr.h" | |
15 | #include "vnic_stats.h" | |
16 | #include "snic.h" | |
17 | ||
18 | int | |
19 | snic_get_vnic_config(struct snic *snic) | |
20 | { | |
21 | struct vnic_snic_config *c = &snic->config; | |
22 | int ret; | |
23 | ||
24 | #define GET_CONFIG(m) \ | |
25 | do { \ | |
26 | ret = svnic_dev_spec(snic->vdev, \ | |
27 | offsetof(struct vnic_snic_config, m), \ | |
28 | sizeof(c->m), \ | |
29 | &c->m); \ | |
30 | if (ret) { \ | |
31 | SNIC_HOST_ERR(snic->shost, \ | |
32 | "Error getting %s, %d\n", #m, ret); \ | |
33 | return ret; \ | |
34 | } \ | |
35 | } while (0) | |
36 | ||
37 | GET_CONFIG(wq_enet_desc_count); | |
38 | GET_CONFIG(maxdatafieldsize); | |
39 | GET_CONFIG(intr_timer); | |
40 | GET_CONFIG(intr_timer_type); | |
41 | GET_CONFIG(flags); | |
42 | GET_CONFIG(io_throttle_count); | |
43 | GET_CONFIG(port_down_timeout); | |
44 | GET_CONFIG(port_down_io_retries); | |
45 | GET_CONFIG(luns_per_tgt); | |
46 | GET_CONFIG(xpt_type); | |
47 | GET_CONFIG(hid); | |
48 | ||
49 | c->wq_enet_desc_count = min_t(u32, | |
50 | VNIC_SNIC_WQ_DESCS_MAX, | |
51 | max_t(u32, | |
52 | VNIC_SNIC_WQ_DESCS_MIN, | |
53 | c->wq_enet_desc_count)); | |
54 | ||
55 | c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16); | |
56 | ||
57 | c->maxdatafieldsize = min_t(u32, | |
58 | VNIC_SNIC_MAXDATAFIELDSIZE_MAX, | |
59 | max_t(u32, | |
60 | VNIC_SNIC_MAXDATAFIELDSIZE_MIN, | |
61 | c->maxdatafieldsize)); | |
62 | ||
63 | c->io_throttle_count = min_t(u32, | |
64 | VNIC_SNIC_IO_THROTTLE_COUNT_MAX, | |
65 | max_t(u32, | |
66 | VNIC_SNIC_IO_THROTTLE_COUNT_MIN, | |
67 | c->io_throttle_count)); | |
68 | ||
69 | c->port_down_timeout = min_t(u32, | |
70 | VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX, | |
71 | c->port_down_timeout); | |
72 | ||
73 | c->port_down_io_retries = min_t(u32, | |
74 | VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX, | |
75 | c->port_down_io_retries); | |
76 | ||
77 | c->luns_per_tgt = min_t(u32, | |
78 | VNIC_SNIC_LUNS_PER_TARGET_MAX, | |
79 | max_t(u32, | |
80 | VNIC_SNIC_LUNS_PER_TARGET_MIN, | |
81 | c->luns_per_tgt)); | |
82 | ||
83 | c->intr_timer = min_t(u32, VNIC_INTR_TIMER_MAX, c->intr_timer); | |
84 | ||
85 | SNIC_INFO("vNIC resources wq %d\n", c->wq_enet_desc_count); | |
86 | SNIC_INFO("vNIC mtu %d intr timer %d\n", | |
87 | c->maxdatafieldsize, | |
88 | c->intr_timer); | |
89 | ||
90 | SNIC_INFO("vNIC flags 0x%x luns per tgt %d\n", | |
91 | c->flags, | |
92 | c->luns_per_tgt); | |
93 | ||
94 | SNIC_INFO("vNIC io throttle count %d\n", c->io_throttle_count); | |
95 | SNIC_INFO("vNIC port down timeout %d port down io retries %d\n", | |
96 | c->port_down_timeout, | |
97 | c->port_down_io_retries); | |
98 | ||
99 | SNIC_INFO("vNIC back end type = %d\n", c->xpt_type); | |
100 | SNIC_INFO("vNIC hid = %d\n", c->hid); | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | void | |
106 | snic_get_res_counts(struct snic *snic) | |
107 | { | |
108 | snic->wq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_WQ); | |
109 | SNIC_BUG_ON(snic->wq_count == 0); | |
110 | snic->cq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_CQ); | |
111 | SNIC_BUG_ON(snic->cq_count == 0); | |
112 | snic->intr_count = svnic_dev_get_res_count(snic->vdev, | |
113 | RES_TYPE_INTR_CTRL); | |
114 | SNIC_BUG_ON(snic->intr_count == 0); | |
115 | } | |
116 | ||
117 | void | |
118 | snic_free_vnic_res(struct snic *snic) | |
119 | { | |
120 | unsigned int i; | |
121 | ||
122 | for (i = 0; i < snic->wq_count; i++) | |
123 | svnic_wq_free(&snic->wq[i]); | |
124 | ||
125 | for (i = 0; i < snic->cq_count; i++) | |
126 | svnic_cq_free(&snic->cq[i]); | |
127 | ||
128 | for (i = 0; i < snic->intr_count; i++) | |
129 | svnic_intr_free(&snic->intr[i]); | |
130 | } | |
131 | ||
132 | int | |
133 | snic_alloc_vnic_res(struct snic *snic) | |
134 | { | |
135 | enum vnic_dev_intr_mode intr_mode; | |
136 | unsigned int mask_on_assertion; | |
137 | unsigned int intr_offset; | |
138 | unsigned int err_intr_enable; | |
139 | unsigned int err_intr_offset; | |
140 | unsigned int i; | |
141 | int ret; | |
142 | ||
143 | intr_mode = svnic_dev_get_intr_mode(snic->vdev); | |
144 | ||
145 | SNIC_INFO("vNIC interrupt mode: %s\n", | |
146 | ((intr_mode == VNIC_DEV_INTR_MODE_INTX) ? | |
147 | "Legacy PCI INTx" : | |
148 | ((intr_mode == VNIC_DEV_INTR_MODE_MSI) ? | |
149 | "MSI" : | |
150 | ((intr_mode == VNIC_DEV_INTR_MODE_MSIX) ? | |
151 | "MSI-X" : "Unknown")))); | |
152 | ||
153 | /* only MSI-X is supported */ | |
154 | SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX); | |
155 | ||
156 | SNIC_INFO("wq %d cq %d intr %d\n", snic->wq_count, | |
157 | snic->cq_count, | |
158 | snic->intr_count); | |
159 | ||
160 | ||
161 | /* Allocate WQs used for SCSI IOs */ | |
162 | for (i = 0; i < snic->wq_count; i++) { | |
163 | ret = svnic_wq_alloc(snic->vdev, | |
164 | &snic->wq[i], | |
165 | i, | |
166 | snic->config.wq_enet_desc_count, | |
167 | sizeof(struct wq_enet_desc)); | |
168 | if (ret) | |
169 | goto error_cleanup; | |
170 | } | |
171 | ||
172 | /* CQ for each WQ */ | |
173 | for (i = 0; i < snic->wq_count; i++) { | |
174 | ret = svnic_cq_alloc(snic->vdev, | |
175 | &snic->cq[i], | |
176 | i, | |
177 | snic->config.wq_enet_desc_count, | |
178 | sizeof(struct cq_enet_wq_desc)); | |
179 | if (ret) | |
180 | goto error_cleanup; | |
181 | } | |
182 | ||
183 | SNIC_BUG_ON(snic->cq_count != 2 * snic->wq_count); | |
184 | /* CQ for FW TO host */ | |
185 | for (i = snic->wq_count; i < snic->cq_count; i++) { | |
186 | ret = svnic_cq_alloc(snic->vdev, | |
187 | &snic->cq[i], | |
188 | i, | |
189 | (snic->config.wq_enet_desc_count * 3), | |
190 | sizeof(struct snic_fw_req)); | |
191 | if (ret) | |
192 | goto error_cleanup; | |
193 | } | |
194 | ||
195 | for (i = 0; i < snic->intr_count; i++) { | |
196 | ret = svnic_intr_alloc(snic->vdev, &snic->intr[i], i); | |
197 | if (ret) | |
198 | goto error_cleanup; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Init WQ Resources. | |
203 | * WQ[0 to n] points to CQ[0 to n-1] | |
204 | * firmware to host comm points to CQ[n to m+1] | |
205 | */ | |
206 | err_intr_enable = 1; | |
207 | err_intr_offset = snic->err_intr_offset; | |
208 | ||
209 | for (i = 0; i < snic->wq_count; i++) { | |
210 | svnic_wq_init(&snic->wq[i], | |
211 | i, | |
212 | err_intr_enable, | |
213 | err_intr_offset); | |
214 | } | |
215 | ||
216 | for (i = 0; i < snic->cq_count; i++) { | |
217 | intr_offset = i; | |
218 | ||
219 | svnic_cq_init(&snic->cq[i], | |
220 | 0 /* flow_control_enable */, | |
221 | 1 /* color_enable */, | |
222 | 0 /* cq_head */, | |
223 | 0 /* cq_tail */, | |
224 | 1 /* cq_tail_color */, | |
225 | 1 /* interrupt_enable */, | |
226 | 1 /* cq_entry_enable */, | |
227 | 0 /* cq_message_enable */, | |
228 | intr_offset, | |
229 | 0 /* cq_message_addr */); | |
230 | } | |
231 | ||
232 | /* | |
233 | * Init INTR resources | |
234 | * Assumption : snic is always in MSI-X mode | |
235 | */ | |
236 | SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX); | |
237 | mask_on_assertion = 1; | |
238 | ||
239 | for (i = 0; i < snic->intr_count; i++) { | |
240 | svnic_intr_init(&snic->intr[i], | |
241 | snic->config.intr_timer, | |
242 | snic->config.intr_timer_type, | |
243 | mask_on_assertion); | |
244 | } | |
245 | ||
246 | /* init the stats memory by making the first call here */ | |
247 | ret = svnic_dev_stats_dump(snic->vdev, &snic->stats); | |
248 | if (ret) { | |
249 | SNIC_HOST_ERR(snic->shost, | |
250 | "svnic_dev_stats_dump failed - x%x\n", | |
251 | ret); | |
252 | goto error_cleanup; | |
253 | } | |
254 | ||
255 | /* Clear LIF stats */ | |
256 | svnic_dev_stats_clear(snic->vdev); | |
257 | ret = 0; | |
258 | ||
259 | return ret; | |
260 | ||
261 | error_cleanup: | |
262 | snic_free_vnic_res(snic); | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
267 | void | |
268 | snic_log_q_error(struct snic *snic) | |
269 | { | |
270 | unsigned int i; | |
271 | u32 err_status; | |
272 | ||
273 | for (i = 0; i < snic->wq_count; i++) { | |
274 | err_status = ioread32(&snic->wq[i].ctrl->error_status); | |
275 | if (err_status) | |
276 | SNIC_HOST_ERR(snic->shost, | |
277 | "WQ[%d] error status %d\n", | |
278 | i, | |
279 | err_status); | |
280 | } | |
281 | } /* end of snic_log_q_error */ |